Necktie fastener



FIG. 1 is a perspective view of a necktie fastener showing my new design;

FIG. 2 is a left end elevational view thereof;

FIG. 3 is a right end elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a necktie fastener, as shown and described. 